SCHLAGE LOCK CO B60N505 Single Cylinder Deadbolt Door Lock Deadbolt operates with a key on the exterior and a thumbturn on the interior For use on exterior doors where additional security is needed Maximum security deadbolt offers superior protection against attacks by crowbar, hammer, wrench, saw, lock pick, and kick-in Lifetime limited mechanical and finish warranty Coordinate with other bright brass products Lifetime brass finish Deadbolt thrown or retracted by key from outside or by inside turn unit Single cylinder Ansi/Bhma Certified A156.5-2001 Universal 2-3/8" To 2-3/4" backset